I need to get this issue resolved as evrytime a product sells I loose money

I sell some larger products 24" X 30" X 6" box and weighs 24lbs.

It sucks how the USPS module does not have dimension support. Becuase the size is whats making it so expensive. How can I fix this issue.

Even my smaller products that do not weigh as much and have smaller box sizes are off by a few dollars.

A few dollars adds up and I need to get this resolved.

Thanks.